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Old 2016-10-31, 19:38   #3
Nick's Avatar
Dec 2012
The Netherlands

1,759 Posts

Originally Posted by LaurV View Post
When i give the example with the two modulus to someone, I like to make it in 2D, put one mod on the first row and the second mod on the first column, and start filling the table diagonally...
That's a good way of visualizing what is going on!

(For anyone with good 3D intuition: imagine copying LaurV's table on to a piece of paper, then bending the top and bottom edges back until they meet each other and gluing them to make a cylinder (with the numbers on the outside). Now take the two cylinder ends and bend them around to meet each other and glue together. This gives a torus (doughnut) on which the sequence of numbers from 0 to 39 inclusive form a helix.)
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